Focalprice has the USB Rechargeable AA Batteries for $4.89 - 6% off with coupon code MAY6OFF = $4.60 with free shipping. Includes 2 batteries. Features intelligent charger and can be charged from any USB port.

500mAH capacity, meaning they "could" charge in a little over an hour but probably take at least 3, and that you're losing more than 1/3rd capacity compared to standard AA NiMH, but in certain uses they could make sense like if you're traveling light but need a laptop and mouse but don't want to take a separate charger for AA cells. Then again, these days there are mice very miserly on power and it could take hundreds of hours of use before your mouse needs a battery swap or recharge with alkaline or LSD (Eneloop, etc) cells in it.

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